Yeah, that's it. My definitions are different than yours due to some deficiency on my part.
That aside...
Please define what you mean when you say "Culture"... and also "Cultural Group".. and please speak to the relationship between "Culture", Ethnicity, Race & Nationality.
I really need to understand this broad brush you've swung in my direction.
..context is everything.
Peace.
www.dictionary.com/browse/culture
culture definition. The sum of attitudes, customs, and beliefs that distinguish one group of people from another. Culture is transmitted, through language, material objects, ritual, institutions, and art, from one generation to the next.
Search Results
Ethnicity refers to shared cultural practices, perspectives, and distinctions that set apart one group of people from another. That is,
ethnicity is a shared cultural heritage. The most common characteristics distinguishing various
ethnic groups are ancestry, a sense of history, language, religion, and forms of dress.
Race and Ethnicity Defined - Cliffs Notes
The traditional definition of race and ethnicity is related to biological and sociological factors respectively. Race refers to a person's physical characteristics, such as bone structure and skin, hair, or eye color. Ethnicity, however, refers to cultural factors, including nationality, regional culture, ancestry, and language.
In the future I expect you to do your own research! Lol